EA016998B1 - The absorbent article - Google Patents

The absorbent article Download PDF

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Publication number
EA016998B1
EA016998B1 EA200900501A EA200900501A EA016998B1 EA 016998 B1 EA016998 B1 EA 016998B1 EA 200900501 A EA200900501 A EA 200900501A EA 200900501 A EA200900501 A EA 200900501A EA 016998 B1 EA016998 B1 EA 016998B1
Authority
EA
Eurasian Patent Office
Prior art keywords
sheet
adhesive
direction
region
mm
Prior art date
Application number
EA200900501A
Other languages
Russian (ru)
Other versions
EA200900501A1 (en
Inventor
Кеи Вакасуги
Хиротомо Мукаи
Томоко Тсуджи
Кеничи Сасаяма
Татсуя Хашимото
Original Assignee
Юни-Чарм Корпорейшн
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2006319392 priority Critical
Application filed by Юни-Чарм Корпорейшн filed Critical Юни-Чарм Корпорейшн
Priority to PCT/JP2007/072782 priority patent/WO2008066006A1/en
Publication of EA200900501A1 publication Critical patent/EA200900501A1/en
Publication of EA016998B1 publication Critical patent/EA016998B1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/514Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51456Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties
    • A61F13/51464Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being stretchable or elastomeric

Abstract

An absorbent article 1 includes an absorbing member 2 in an elongated shape arranged along a longitudinal direction of the absorbent article, and a chassis 3 comprising a substantially rectangular front body portion extending in the width direction, a substantially rectangular rear body portion extending in the width direction, and an intermediate body portion 112 extending in the longitudinal positioned between the front body portion 10 and the rear body portion 11, in which said front body portion and rear body portion are composed of a stretchable sheet 13 obtained by affixing a plurality of adhesive portions 18, a stretchable sheet 15 and a non-stretchable sheet 16 to each other by a plurality of adhesive portions 18, a first sheet having the first expansion and contraction coefficient and a second first sheet having the second expansion and contraction coefficient, where said first and second expansion and contraction coefficients differ from one another. The first stretchable sheet has a basis weight from 20 to 80 g/mbefore it is affixed to the second non-stretchable sheet, the second sheet has a basis weight from 10 to 50 g/m. A plurality of adhesive portions extend in the longitudinal direction at predetermined intervals in the width direction. The absorbing member 2 is affixed to the front body position 10 and the rear body position 11 and provided with a liquid-impermeable back sheet 7 arranged from the side of the front and rear body positions and the intermediate body position.

Description

The present invention relates to an absorbent article comprising a composite sheet obtained by combining two types of sheets having different stretching and contraction coefficients.

Prerequisites for the creation of the present invention

Conventionally, disposable diapers are known, for example, as absorbent articles. Disposable diapers, widely used for infants and children for the elderly and those with physical disabilities, are replaced with reusable absorbent products made from cloth. Such a disposable diaper, in general, includes an absorbing element in an elongated configuration placed along the longitudinal direction and a base having a leg-shaped portion formed therein, which is recessed in the width direction on both sides in the width direction, and formed from a composite sheet, obtained by combining two sheets. In accordance with the Japanese unexamined patent application, the first publication No. 2004-136068 (hereinafter referred to as patent publication 1), some composite sheets were obtained by coating the entire surface of one of the two sheets with adhesives for high-precision placement of the thread-like stretchable element between two sheets and joints to it third sheet. Among other things, as described in the Japanese unexamined patent application, first publication No. 2002-143218 (hereinafter referred to as patent publication 2), there is also the technology of joining a sheet-like stretchable sheet to a non-stretchable sheet to obtain a composite sheet in order to improve appearance and fit on the figure of a pant diaper. FIG. 6 is a front view of a pant-shaped diaper 201 using composite sheet 213 obtained by combining such stretchable and non-stretchable sheets 215 and 216, respectively, for parts that include the surrounding torso and the surrounding legs of the diaper. Composite sheet 213 is formed from two sheets, i.e., from a non-stretchable sheet 216 on the side of the surface that comes into contact with the skin of the body of the person on the diaper, directed toward the body of the person who is wearing the diaper, and from the stretchable sheet 215 the side of the surface that is not in contact with the skin of the person on the diaper, which is the opposite side of the surface, which is in contact with the skin of the person who is wearing the diaper and connected to each other dstvom adhesives applied to all surfaces of the sheet.

Description of the present invention

Problems to be solved by the present invention.

When the stretch-resistant sheet 216 and the stretchable sheet 215 are thus bonded to each other by adhesives applied to all surfaces of the sheets, the bending portion 225 that curves to the surface that does not come into contact with the skin of the body of the person wearing the diaper , that is, a part having a height not less than twice the height of other parts in a stationary state, or a part with a front surface that appears to be turned to the back surface, or a reverse surface that seems to be rnutoy to the front surface in a stationary state occurs at the edge of the recess 204 surrounding leg portion 203a. FIG. 7 is an enlarged view of area A shown in FIG. 6, illustrating the cross-section of the part where such a warping part 225 takes place. The arrows indicate the direction of stretching and contraction (ECE) in this part. The non-stretchable sheet 216 on the side of the surface that comes into contact with the skin of the body of the person on the diaper is stretched by the contractive force of the stretchable sheet 215 on the side of the surface that is not in contact with the skin of the body on the diaper, so that the warping part 225 takes place. When the warping part 225 is thus provided in the base 203, the adhesion between the skin of the body of the person on the diaper and the composite sheet 213 is broken, so that the gap occurs between the body skin of the person wearing the diaper and the composite sheet 213. Thus, urine probably leaks from the gap.

An object of the present invention is to provide an absorbent article that is not freely curved in the surrounding leg portion.

Means to solve these problems.

The authors of the present invention conducted a detailed study to achieve the above goal. As a result, they found that if the stretchable sheet and the non-stretchable sheet are connected to each other, and the adhesive areas are provided extending in a direction substantially perpendicular to the direction of stretching and contraction between the sheets at the edge of the cutout of both sheets to prevent the curved portion at the edge cut, then achieved the purpose of the present invention. In particular, the goal is to provide an absorbent article as described below.

In the first aspect of the present invention, the absorbent article has a width direction and a longitudinal direction, perpendicular to the width direction, and includes an absorbing element in an elongated configuration positioned along the absorbing longitudinal direction of

- 1,016,998 Delia; and a stretchable base having a surrounding leg portion, inward in the width direction of the absorbent article on both sides in the width direction formed therein, in which at least part of the base consists of a stretchable composite sheet obtained by joining with a plurality of adhesive sections , the first sheet and the second sheet, having a coefficient of stretching and contraction, which differs from the coefficient of stretching and contraction of the first sheet, with the surrounding legs It has a line of intersection that intersects the direction of stretching and contraction of the base at a given angle, and a number of adhesive sections extend at predetermined intervals in the direction of stretching and contraction at the intersection line and in a direction substantially perpendicular to the direction of stretching and contraction.

In the second aspect of the absorbent article, as described in the first aspect of the present invention, the predetermined angle is in the range of 20 ° to 90 °.

In the third aspect of the absorbent article described in the first and second aspect of the present invention, the difference in stretch and contraction coefficients in the composite sheet between the first sheet and the second sheet, respectively, is at least 20%.

In a fourth aspect of the absorbent article, as described in any one of the three preceding aspects of the present invention, the size in the direction of stretching and contraction of the plurality of adhesive portions is in the range of 0.1-20 mm.

In the fifth aspect of the absorbent article, as described in any one of the preceding four aspects of the present invention, the gaps between adhesive portions adjacent to each other on the intersection line of the surrounding leg portion are in the range of 4-25 mm.

In the sixth aspect of the absorbent article, as described in any one of the foregoing five aspects of the present invention, the direction of stretching and contraction is the width direction, and each of the plurality of adhesive portions is formed in a linear configuration extending in a direction substantially perpendicular to the direction of stretching and contraction.

In the seventh aspect of the absorbent article, as described in any one of the preceding six aspects of the present invention, the aspect ratio of the plurality of adhesive portions in the vicinity of the intersection line is in the range of 0.4 to 83%.

In the eighth aspect of the absorbent article, as described in any one of the preceding seven aspects of the present invention, the absorbent article is a pant diaper.

The effects of the present invention.

The present invention provides an absorbent article that is not freely curved in the surrounding leg portion.

Brief Description of the Drawings

FIG. 1 is an exploded view of a disposable diaper according to a first embodiment of the present invention;

FIG. 2 is a front view of a disposable diaper formed in the shape of a pant according to a first embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating a state in which the stretchable sheet and the non-stretchable sheet are connected to each other;

FIG. 4 is an exploded view of a disposable diaper according to a second embodiment of the present invention;

FIG. 5 is a front view of a disposable diaper formed in the shape of a pant according to a second embodiment of the present invention;

FIG. 6 is an exploded view of a traditional disposable diaper; and FIG. 7 is an enlarged view of the region A shown in FIG. 6, illustrating a warping portion occurring at the cut-out edge of a traditional disposable diaper.

Detailed Description of the Preferred Embodiments of the Present Invention First Embodiment.

A disposable diaper 1 serving as an absorbent article according to a first embodiment of the present invention will now be described with reference to the accompanying drawings. In the following description, the surface directed to the body of the individual on the disposable diaper is considered to be the surface that is in contact with the skin of the body of the person who is wearing the diaper, and the surface opposite to the surface that is in contact with the skin of A comforter is wearing a diaper, considered to be a surface that does not come into contact with the skin of the person wearing the diaper.

FIG. 1 shows an exploded view of a disposable diaper 1 according to the present invention. FIG. 2 is a front view of a disposable diaper 1 formed in the form of pants, shown in the unfolded state in FIG. 1. As shown in FIG. 1, a disposable diaper 1 includes an absorbent element 2 in an elongated configuration located in the longitudinal direction (CE) and a stretchable base 3, having a leg 3, part 3a, which is recessed therein in an I-shaped configuration

- 2,016,998 inwards on both sides in the width direction (\ 7E).

First, the base 3 is described. As shown in FIG. 1, the base 3 has a part 3 a surrounding the legs, and in an I-shaped manner which is deepened inwards in it in the width direction on both sides, as described above. The base 3 is divided into two parts, i.e., the front part 10 of the body and the rear part 11 of the body, through a line C passing through the part that becomes the narrowest, thanks to the I-shaped cuts of the surrounding leg of the part 3a of the base 3, and passing in the width direction. If we allow the edge 4 of the notch of the surrounding leg of part 3 to be angled to the direction of stretching and contraction of the base 3 (direction of width) in the edge of the notch 4, as illustrated, at the end in the direction of the width of the front part 10 of the body, the angle a is 0 °, then there is a cutout edge 4 parallel to the direction of stretching and cutting of the base 3. The angle a gradually increases from the end position to the center in the width direction of the base 3 to the position where the base 3 and the absorbing element 2 overlap with each other to form the intersection line, Securing the direction of stretching and contraction of the base 3. In the position where the base 3 and the absorbing element 2 overlap, the angle a is approximately equal to 90 °.

FIG. 3 shows a cross section of the base 3 from the width direction. The sheet constituting the base 3 is a composite sheet 13, obtained by connecting the stretchable sheet 15 and the non-stretchable sheet 16 to each other in the adhesive portions 18 by means of an adhesive 19, for example a hot-melt adhesive, as illustrated. This composite sheet 13, obtained by connecting the stretchable sheet 15 and the stretchable sheet 16, can be stretched and contracted in the width direction and placed on the base 3 so as to stretch and contract in the width direction. With a non-tense stretchable sheet 15, a plurality of folds 17 are formed in a direction perpendicular to the direction of stretching and contraction in non-adhesive portions that are not connected to the stretchable sheet 15 of the non-stretchable sheet 16.

The material for the stretchable sheet 15 may, if necessary, be modified in accordance with the intended use of the absorbent article or for some other reason. For example, various types of known stretchable sheets 15 may be selected, for example, a nonwoven sheet of a spinneret production method and a non-woven sheet obtained by melting from an aerodynamic method. Fibers based on polyolefin, polyester or polyamide, or bicomponent core-sheath fibers or bicomponent fibers with parallel styling of the components formed from polyethylene / polypropylene or polyethylene / polyester are suitable as fibers constituting stretchable sheets 15. In addition, a stretchable sheet 15 obtained by melting and spinning a thermoplastic synthetic resin based on urethane can be used to obtain a non-woven sheet of the spunbond production method and stretching the spunbial sheet of the production method in at least one direction for stretchable elasticity.

Although the bulk of the stretchable sheet 15 can be changed as necessary, according to the intended use, it is preferable that the bulk of the stretchable sheet 15 is 20-80 g / m 2 before connecting it to the non-stretchable sheet 16. If the bulk of the stretchable sheet 15 less than 20 g / m 2 , its tensile strength in some cases may be reduced. On the other hand, if the bulk of the stretchable sheet 15 exceeds 80 g / m 2 , then its thickness may in some cases increase.

The tensile strength during the 100 percent stretch of the stretchable sheet 15 is preferably not more than 10 N / 50 mm, and more preferably is in the range of 1-7 N / 50 mm.

In addition, the curvature of the stretchable sheet 15 after 100 percent stretching is preferably not more than 15%, and more preferably is not more than 10%.

The material for the non-stretchable sheet 16 may, if necessary, be modified according to the intended use of the absorbent article or for some other reason. For example, various types of known non-stretchable sheets 16 may be selected, for example, a non-woven sheet of a spin-type production method, an 8M8 non-woven sheet (a non-woven sheet obtained by a spinnere / aerodynamic / spinning production method), a sheet obtained by dotted connection of fibers air needle-punched sheet. They can be used alone or in combination. Used as fibers constituting non-stretchable sheets 16 are polypropylene, polyolefin, polyester or polyamide based fibers, or bicomponent core-sheath fibers or bicomponent fibers with parallel components, formed from polyethylene / polypropylene or polyethylene / polyester.

Although the bulk of the non-stretchable sheet 16 can be changed if necessary, according to the intended use, it is preferable that the bulk of the non-stretchable sheet is 10-50 g / m 2 . If the bulk is indestructible

- 3 016998 of sheet 16 is less than 10 g / m 2 , its tensile strength in some cases may decrease. On the other hand, if the bulk of the non-stretchable sheet 16 exceeds 50 g / m 2 , then its thickness may in some cases increase. If the thickness of the non-stretchable sheet 16 increases, then its rigidity increases, thereby suppressing the tensile property accordingly. This causes a decrease in the flexibility of the composite sheet 13.

Examples of the method of coating adhesives for connecting a stretchable sheet 15 and a stretchable sheet 16 to each other include the application of controlled suture coatings, coating using a coating installation, coating using an irrigation coating installation and coating spray bottle. The basis weight of hot melt adhesives is preferably in the range of 1-30 g / m 2 , and more preferably in the range of 3-10 g / m 2 .

Absorbing element 2 will now be described. The absorbing element 2 has a moisture-permeable top sheet 6 of a substantially longitudinal configuration, constituting a front surface layer, a moisture-proof back sheet 7, substantially in a vertical-longitudinal configuration constituting the reverse surface layer, and an absorbent body 8 essentially in a rectangular configuration, having water-holding properties and constituting an absorbing layer located between the moisture-permeable upper sheet 6 and the moisture-proof back sheet 7. Pog The glossing element 2 is connected to the surface on the side of the surface that comes into contact with the skin of the body of the person on the diaper, in the center of the base 3 so that the waterproof back sheet 7 and the base 3 are located opposite each other.

It should be noted that the substantially longitudinal configuration indicates essentially a rectangular or elliptical shape having a direction of a longer side (longitudinal direction) and a direction of a shorter side, and additionally includes a form in which parts of both sides are in longitudinal direction. the direction is recessed towards the center in the longitudinal direction or protruding in the opposite direction towards the center. More specifically, the absorbent body 8, in a substantially longitudinal configuration, includes a shape having portions that differ in width along the longitudinal direction. Although in the present embodiment, the absorbent body 8 extends in the longitudinal direction, the present invention is not limited to this. The absorbent body 8 can extend in the width direction.

In addition, the absorbent body 8 may be arranged in a state in which it is wrapped in tissue paper (not shown) or a hydrophilic sheet (not shown). Being wrapped in a hydrophilic sheet, the absorbent body 8 may not use a moisture-permeable top sheet 6 or may only partially use a moisture-permeable top sheet 6. This makes it possible to reduce the cost price. In addition, a sheet, such as a nonwoven material, may be connected to a surface on the side of the surface that does not come into contact with the skin of the body of the person wearing the diaper of the moisture-proof back sheet 7, which is preferable as it improves the skin feeling who is wearing a diaper while he wears it. Alternatively, when using a film for a moisture-proof back sheet 7, a sheet or similar material may be connected to the film, which is preferable since, for example, unwanted sound due to the friction of the film can be prevented.

The absorbent body 8 is designed to absorb and retain the liquid secretions of the body on a nappy, such as urine, and can be formed by mixing and laminating a highly absorbent polymer and hydrophilic fibers or formed by fixing a highly absorbent polymer to a hydrophilic sheet with a hot-melt adhesive or similar material.

The moisture permeable upper sheet 6 is placed on the side of the body of the person on whom the diaper is worn, and when used, is brought into contact with the excretory (excretory) part. Examples of the moisture-permeable topsheet 6 include not only a moisture-permeable topsheet having the entire surface of the moisture-permeable, but also to the moisture-permeable topsheet that is partially moisture-permeable. In addition, the moisture-permeable top sheet 6 may be formed from a single sheet-like element or may be formed by connecting a plurality of sheet-like elements with each other.

As a moisture-permeable topsheet 6, it is preferable to have a material that has sufficient tensile strength in order not to collapse even if a load is applied to it during compression of the diaper due to compression, twisting, rubbing or similar force. who is wearing a diaper. Suitable as a material is a sheet-like material having a moisture permeability, for example a woven material, a nonwoven material or a porous polymer sheet.

Although the moisture-proof back sheet 7 is placed on the side of the surface that is not in contact with the skin of the body of the person on the diaper, being opposite to the base 3, as described above, the present invention is not limited to this. For example, it may be provided among the plurality of sheets constituting base 3.

The following will describe the coating pattern of the adhesive portions 18 in the base 3. As shown

- 4,016,998 by dashed lines in FIG. 1 and 2, in the surrounding torso of the part 5 in the base 3, the adhesive portions 18 alternately extend with predetermined lengths along a plurality of straight lines extending at predetermined intervals in the longitudinal direction. Adhesive patches 18 on adjacent straight lines alternate. That is, the adhesive portions 18 extend in a direction substantially perpendicular to the direction of stretching and contraction of the base 3. The cut portion 18a of the adhesive portion 18 is not represented in the same straight line in the same position in the longitudinal direction as the cut portion 18a of the adhesive portion 18 on the adjacent straight line lines. It should be noted that the size (width) in the direction of stretching and contraction of the adhesive region 18 is preferably in the range of 0.1-20 mm, and in the present embodiment, it is 2.5 mm.

In addition, in the edge 4 of the notch of the surrounding leg part 3a, the adhesive sections 18 extend in a longitudinal direction, similar to those that go into the surrounding body part 5. That is, the adhesive sections 18 extend in a direction substantially perpendicular to the direction of stretching and contraction of the base 3 in all the areas of the surrounding leg of part 3a, regardless of the angle of the edge 4 of the notch to the direction of stretching and contraction of the base 3. In this embodiment, the gaps in the width direction of the adhesive sections 18 at the edge 4 of the notch of the surrounding leg are and 3a is denser than in the surrounding torso of part 5 and make up approximately half of the gaps in the surrounding torso of part 5. In particular, the gaps between the adhesive sections 18 in the surrounding leg of part 3a are preferably at least 4 mm. However, if the gaps between the adhesive areas 18 are too large, then the space at the end of the surrounding leg of part 3a is tangible. Thus, the gaps do not adequately exceed 25 mm, although they vary depending on the stretch ratio and contraction. Thus, by creating gaps between the adhesive sections 18 at the edge 4 of the circumference of the surrounding leg of part 3a, which are narrower than in the surrounding body of part 5, the integration between the stretchable sheet 15 and the stretchable sheet 16 in the composite sheet 13 is improved to improve the fit on the body wearing a diaper, which can suppress urine leakage or similar problems. The minimum ratio of the areas of the adhesive sections 18 to the composite sheet 13 in the vicinity of the intersection line, in which the edge 4 of the notch intersects the direction of stretching and contraction of the base 3, is 0.1 / (0.1 + 24) x 100 = 0.4% because the width adhesive pads 18 is in the range of 0.1-20 mm, and the gap between adjacent adhesive sections 18 is in the range of 4-25 mm. On the other hand, the maximum area ratio is 20 / (20 + 4) x 100 = 83%. Therefore, the area ratio is preferably in the range of 0.4-83%. In this case, the term neighborhood indicates a given area between the edge 4 of the notch and the curve, separated from the edge 4 of the notch by a length that is not greater than the corresponding lengths of the adhesive sections 18.

A disposable diaper 1 having the above configuration is folded from the unfolded state illustrated in FIG. 1, and is shaped like a pant, as shown in FIG. 2, by intermittently connecting the front portion 10 and the rear portion 11 in the connecting portions 20 provided on both sides in the width direction, using ultrasonic welding, heat sealing, or similar welded joints.

A disposable diaper 1 formed in the shape of a pant is generally in the condition shown in FIG. 3, where the stretchable sheet 15 is not stretched so that a plurality of folds 17 is formed in the non-stretchable sheet 16. If the base 3 extends in the width direction while wearing, for example, the stretchable sheet 15 is stretched so that the folds in the unstretchable stretch 16 are aligned (smoothed).

As described above, in accordance with the present invention, the adhesive portions 18 extend in a direction substantially perpendicular to the direction of stretching and contraction of the base 3 in all areas of the surrounding leg of part 3 a, i.e., the intersection line in which the edge 4 of the notch of the surrounding leg of part 3 a Crosses the direction of stretching and contraction of the base 3 at a large angle. Thus, even if, at the edge 4 of the surrounding leg cutout part 3a, the stretchable sheet 15 is on the side that does not come into contact with the skin of the body on which the diaper is attached, the surface is reduced, then the non-stretchable sheet 16 is on the side, the contact with the skin of the body of the person wearing the diaper is pushed to the stretchable sheet 15 due to the presence of adhesive patches 18, suppressing accordingly the curvature of the disposable diaper 1 towards the outside . Thus, curvature is suppressed, which prevents urine leakage or similar problems.

Second Embodiment of the Present Invention

A disposable diaper 101 serving as an absorbent article in accordance with a second embodiment of the present invention will now be described with reference to the accompanying drawings. In the second embodiment, descriptions similar to those made in connection with the first embodiment will not be repeated. FIG. 4 is an exploded view of the disposable diaper 101 according to the second embodiment. The present embodiment is different from the first embodiment in that

- 5 016998 that the base 103 is not formed as an integral element and in addition to the front part 110 and the rear part 111, which stretch and contract in the width direction (\ UE). has a crotch region 112, which is located between the front portion 110 and the rear portion 111, which stretches and contracts in the longitudinal direction (b).

The front portion 110 is a substantially rectangular element in a horizontally elongated configuration extending in the width direction. The front portion 110 consists of a composite sheet 113, including a stretchable sheet (not shown in FIG. 4) and a stretchable sheet 116, and stretched and contracted in the width direction, as in the first embodiment of the present invention.

Although the rear part 111 is also an essentially rectangular element in a horizontally elongated configuration extending in the width direction, it is slightly curved for a better fit over the body of the person wearing the diaper, at the edge 104 of the surrounding leg's cutout part 103 a. The rear portion 111 consists of a composite sheet 113, which includes a stretchable sheet and a non-stretchable sheet 116, and stretches and contracts in the width direction, like the front portion 110.

The crotch region 112, positioned between the front portion 110 and the rear portion 111, is essentially a longitudinal member extending in the longitudinal direction. The edge 104 of the notch is curvilinear in the I-shape so as to be smoothly continuous from the corresponding edges of the notch of the front part 110, the crotch area 112 and the rear part 111. Although the crotch area 112 consists of a composite sheet 113, comprising a stretchable sheet and resistant By stretching the sheet 116, like the front part 110, it stretches and contracts in the longitudinal direction.

An absorbent element 102, formed in a similar manner as in the first embodiment of the present invention, is obtained for coupling in the range from the front portion 110 to the rear portion 111, centered in the crotch region 112.

The base 103, consisting of the composite sheet 113, and in the unfolded state, as shown in FIG. 4, where the absorbent element 102 is folded, connected to its middle, is formed in the shape of a pant, as shown in FIG. 5, by intermittently connecting the front portion 110 and the rear portion 111, respectively, to the connecting portions 120 provided on both sides in the width direction, using ultrasonic welding, heat sealing, or similar welding, as in the first embodiment of the present invention.

A pattern of the coating of the adhesive portions 118 in the front portion 110 and the rear portion 111, which expand and contract in the width direction, will now be described. As indicated by the dotted lines in FIG. 4 and 5, the adhesive portions 118 intermittently extend, respectively, with predetermined lengths along a plurality of straight lines extending at predetermined intervals in the longitudinal direction, as in the first embodiment. Adhesive patches 118 on adjacent rectilinear lines extend in such a way as to alternate. That is, the adhesive portions 118 extend in a direction substantially perpendicular to the direction of stretching and contraction of the base 103.

In the surrounding leg of the portion 103a in the front portion 110 and the rear portion 111, the direction in which the adhesive sections 118 extend is the longitudinal direction, as in other parts, i.e., a direction substantially perpendicular to the direction of stretching and contraction of the base 103. In this embodiment the gaps in the width direction between the adhesive portions 118 in the surrounding leg portion 103a are approximately half the gaps in the width direction in the surrounding torso portion 105.

As indicated above, the present embodiment is a case in which the direction of stretching and contraction of the base and the direction of stretching and contraction of the crotch region 112, the front portion 110 and the rear portion 111 are different. In this regard, the adhesive sections 118 in the crotch region 112 extend in a direction parallel to the direction of stretching and contraction of the base 103 (width direction), and are applied along a plurality of straight lines arranged at predetermined intervals in the longitudinal direction. In this case, although the direction of stretching and contraction of the crotch region 112 is different from the direction of stretching and contraction of the front portion 110 and the rear portion 111, the adhesive portions 118 extend in a direction substantially perpendicular to the direction of extension and contraction in the surrounding leg portion 103a.

As described above, in accordance with the present embodiment, the adhesive portions 118 extend in a direction substantially perpendicular to the direction of stretching and contraction of the base 103 in all areas of the surrounding leg portion 103a. That is, the adhesive portions 118 extend so as to be substantially perpendicular to the direction of stretching and contraction of the front part 110 and the rear part 111, and so as to be essentially perpendicular to the direction of stretching and contraction of the crotch area 112. Therefore, a similar effect is provided as an effect of the first embodiment.

Although the description is provided for the corresponding embodiments of the present invention, the present invention is not limited to them. Although in the present embodiment, the description

- 6 016998 is provided for a disposable diaper in the form of panties having a trunk opening and a pair of leg openings by connecting the front part and the rear part in predetermined adhesive portions, the present invention is not limited to such a configuration. For example, the present invention can be applied to a disposable non-deployable type diaper, which can be worn by locking the front and back using a fastener or similar fastener.

Alternatively, the present invention can be used for a disposable diaper formed in the form of pants that can be fastened with a fastener, such as a hook-and-loop fastener that can be re-fastened as used in a disposable non-expandable diaper, is simply unfastenable in adhesive areas front and rear, and can be unfolded and unbuttoned.

In addition, although in the present embodiment, the description is provided as a disposable diaper for adults, the present invention is not limited to such a diaper. For example, it can be a disposable diaper for children.

Examples

An experiment conducted to control adequate conditions in an adhesives pattern will now be described.

1. The cut-out edge of the composite sheet, in which the stretch ratio and contraction of the stretchable sheet was 1.8, during the connection of the stretchable sheet and the stretchable sheet was set to 10, 30, 45, 60 and 80 ° to the direction of stretching and contraction, moreover, the width along the direction of stretching and contraction of the adhesive areas was a constant value equal to 2.5 mm, and the gap between the adhesive areas changed to (b) 1 mm, (e) 2.5 mm, (ί) 4 mm and (e) 7 , 5 mm to study the degree of curvature. For reference, a similar experiment was also performed on case (a), in which adhesives were applied to the entire surface, case (b), where the gap between the lines adjacent in a spiral configuration was no more than 3 mm (fine mesh configuration), and case ( c) where the gap between adjacent lines in a spiral configuration was approximately 4 mm and was at least 3 mm (coarse grid configuration).

In this case, the non-stretchable sheet was a non-woven sheet of a spunbond production method with a basis weight of 19 g / m 2 and the stretchable sheet was a stretchable non-woven sheet of a spun-like method of production with a basis weight of 35 g / m 2 (urethane / polypropylene). The results are shown in Table. 1 are described below. In this table, the symbol o indicates a good condition, the symbol Δ indicates a slightly curved state, the symbol x indicates a significantly curved state, and the symbol xx indicates a state where the degree of curvature is worst. In this case, x and xx indicate that the disposable diaper is defective.

Table 1

The angle of the cut-out of the end of the composite sheet to the direction of stretching and cutting

10 °

30 °

45 °

60 °

80 °

a. Coating the entire surface

b. Spiral (fine mesh configuration)

c. Spiral (large mesh configuration)

ό. The gap between the adhesive areas; 1 mm

e. The gap between the adhesive areas; 2.5 mm. The gap between the adhesive areas; 4 mm

e. The gap between the adhesive areas; 7.5 mm

Δ ~ χ

Xx xx

Xx

Xx xx

Xx

Xx

Xx

Tab. 1 shows that a strong curvature occurs in the case where adhesives were applied in a linear configuration, compared with the case where adhesives were applied to the entire surface. It was found that the longer the gaps between the adhesive areas, the less curvature takes place. In addition, it was found that even when adhesives were applied in a spiral configuration continuously in a flat form, the curvature does not simply occur if the distances between the lines were large.

2. The results of a similar experiment, carried out with a change only in the coefficient of stretching and contraction to a value of 1.3 in experiment 1, are shown in Table. 2

- 7 016998

table 2

The angle of the cut-out of the end of the composite sheet to the direction of stretching and cutting 10 ° 30 ° 45 ° 60 ° 80 ° but. Coating the entire surface about Δ X Xx Xx B. Spiral (fine mesh configuration) 0 Δ X Xx Xx with. Spiral (large mesh configuration) ABOUT ABOUT Δ X X ά. The gap between adjacent parts; 1 mm ABOUT Δ ~ ο X Xx Xx e. The gap between the adhesive areas; 2.5 mm ABOUT about Δ X Xx ί. The gap between the adhesive areas; 4 mm ABOUT about 0 Δ X e. The gap between the adhesive areas; 7.5 mm 0 0 0 0 Δ

Like tab. 1 tab. 2 shows that a strong curvature occurs in the case where the adhesives were applied in a linear configuration as compared to the case where the adhesives were applied to the entire surface. It was found that the longer the gaps between the adhesive areas, the less curvature occurs. It was found that in the case where the adhesives were applied in a spiral configuration continuously in a flat form, the curvature does not simply occur if the gaps between the lines were large. In addition, it was found that the degree of curvature was low until the notch angle reached 30 o , although the curvature had already occurred when the notch angle was 30 o in the case where the coefficient of stretching and contraction was 1.8.

3. The results of the study of the degree of curvature by setting the gaps between the adhesive areas equal to a constant value of 1 mm and changing the width of the adhesive areas to (a) 2.5 mm, (b) 5.0 mm, (c) 1.0 mm and (b) 20 mm are given in table. 3. It should be noted that no experiment was conducted on cases where the width of the adhesive sections was 5.0, 10 and 20 mm when the notch angle was 10 °.

__Table 3

The angle of the cutout of the end of the composite sheet to the direction of stretching and cutting ________

10 ° 30 ° 45 ° | 60 80 °

but. The width of the adhesive areas; 2.5 mm 0 about Δ X Xx B. The width of the adhesive areas; 5.0 mm X X Xx Xx with. The width of the adhesive areas; 10 mm X Xx Xx Xx ά. The width of the adhesive areas; 20 mm X Xx Xx Xx

Tab. 3 shows that with a decrease in the width of the adhesive areas, the curvature decreases.

4. In table. 4 shows the results of the study of the degree of curvature by setting the gaps between the adhesive areas at a constant value of 4 mm and changing the width of the adhesive areas to 2.5, 5.0, 1.0 and 20 mm.

Table 4

The angle of the cut-out of the end of the composite sheet to the direction of stretching and cutting 10 ° 30 ° 45 ° 60 ° 80 ° but. The width of the adhesive areas; 2.5 mm 0 ABOUT 0 0 B. The width of the adhesive areas; 5.0 mm 0 ABOUT Δ ~ ο X with. The width of the adhesive areas; 10 mm ABOUT ABOUT X Xx ά. The width of the adhesive areas; 20 mm ABOUT ABOUT Xx Xx

Tab. 4 shows that with a decrease in the width of the adhesive areas, the curvature decreases. The gaps between the adhesive areas were longer, so that the degree of curvature, in general, was lower compared with the results shown in Table. 3

5. In table. 5 shows the results of measuring the degree of curvature by setting the gaps between the adhesive areas equal to a constant value of 7.5 mm and changing the width of the adhesive areas to 2.5, 5.0, 10 and 20 mm.

- 8 016998

Table 5

The angle of the cut-out of the end of the composite sheet to the direction of stretching and cutting 10 ° 30 ° 45 ° 60 ° 80 ° but. The width of the adhesive areas; 2.5 mm about ABOUT about about Δ B. Adhesive width about ABOUT ABOUT Δ X plots; 5.0 mm with. The width of the adhesive areas; 10 mm ’ about ABOUT Δ ~ ο X Xx b. The width of the adhesive areas; 20 mm about about X Xx Xx

Tab. 5 shows that with a decrease in the width of the adhesive areas, the curvature decreases. The gaps between the adhesive areas were 7.5 mm, so that the degree of curvature, in general, was lower compared to the results given in Table. 3 and 4.

From the results given above in experiments 1-5, it was found that with an increase in the gaps between the adhesive areas, a decrease in curvature takes place. The gaps between the adhesive areas are preferably not less than 4 mm. However, if the gaps are too large, then at the end of the composite sheet there is a noticeable gap. For this reason, the gaps were preferably not more than 25 mm, although they varied depending on the coefficient of stretching and compression. In addition, it was found that the width of the adhesive sections was preferably narrow.

Although the preferred embodiments of the present invention have been described and illustrated above, it should be obvious that they are examples of the implementation of the present invention and should not be construed as limitations. Additions, deletions, substitutions and other modifications may be made without departing from the spirit or scope of the present invention. Accordingly, the present invention is not to be considered limited by the above description, but is limited only by the scope of the attached claims.

Claims (6)

  1. CLAIM
    1. Absorbing product containing absorbing element in an elongated configuration, placed along the longitudinal direction of the absorbing product; and a base including a generally rectangular anterior region in length, located in the width direction, a generally rectangular posterior region in length, located in the width direction, and a crotch region located in the longitudinal direction between the anterior region and the posterior region in which said anterior region and the back region consists of a stretchable composite sheet, obtained by combining in a plurality of adhesive portions of the first sheet, having a first stretch factor and a short scheniya and a second sheet having a second coefficient of expansion and contraction, wherein said first and second stretch ratios and reduction are different from each other, and wherein the first sheet has a basis weight of from 20 to 80 g / m 2 before connection with the second sheet and the second The sheet has a basis weight from 10 to 50 g / m 2 , where a plurality of adhesive sections are made in the longitudinal direction with certain intervals in the width direction and where the absorbing element is connected to the front region and the rear region and is fitted with a waterproof rear located on the anterior and posterior regions, and the crotch region.
  2. 2. Absorbent product according to claim 1, in which the difference between the first and second coefficient of stretching and reduction in the composite sheet is at least 20%.
  3. 3. Absorbent product according to any one of claims 1 or 2, in which the width of each of the plurality of adhesive areas is in the range of 0.1-20 mm.
  4. 4. Absorbing product according to any one of claims 1 to 3, in which the adhesive areas adjacent to each other, located at the edge of the front and rear areas adjacent to the crotch area, are made at a distance of 4-25 mm from each other.
  5. 5. Absorbing product according to any one of claims 1 to 4, in which the ratio of the sum of the areas of the areas of adhesive areas at the edge of the front and rear areas adjacent to the crotch area to the rest of the composite sheet is in the range of 0.4-83%.
  6. 6. Absorbent product according to any one of claims 1 to 5, in which the absorbent product is a pant diaper.
    - 9 016998
EA200900501A 2006-11-27 2007-11-26 The absorbent article EA016998B1 (en)

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JP5430178B2 (en) * 2009-03-03 2014-02-26 ユニ・チャーム株式会社 Disposable diapers
JP5777271B2 (en) * 2009-03-25 2015-09-09 ユニ・チャーム株式会社 wearing article
JP5280277B2 (en) * 2009-03-31 2013-09-04 ユニ・チャーム株式会社 Wearing article
JP5691254B2 (en) * 2010-06-21 2015-04-01 王子ホールディングス株式会社 Method for producing laminated sheet for absorbent article, laminated sheet for absorbent article, and absorbent article
JP5930584B2 (en) 2011-01-07 2016-06-08 ユニ・チャーム株式会社 Disposable diapers
WO2012133294A1 (en) * 2011-03-31 2012-10-04 王子ネピア株式会社 Disposable diaper
JP5938848B2 (en) * 2011-03-31 2016-06-22 王子ホールディングス株式会社 Disposable diaper manufacturing method
JP5811615B2 (en) * 2011-06-15 2015-11-11 王子ホールディングス株式会社 disposable diapers
WO2013171272A2 (en) * 2012-05-16 2013-11-21 Novopolymers N.V. Multilayer encapsulant film for photovoltaic modules
CN103770378B (en) * 2013-12-30 2015-09-30 黄山富田精工制造有限公司 A composite stretch sheet and manufacturing method thereof
JP6255270B2 (en) * 2014-02-14 2017-12-27 ユニ・チャーム株式会社 Pants-type absorbent article
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US20080125740A1 (en) 2008-05-29
US20110022020A1 (en) 2011-01-27
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KR20090084951A (en) 2009-08-05
EA200900501A1 (en) 2009-10-30

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